MBSS Site Summary for: PATL-209-X-2012

Site Photos

Field photo showing stream conditions at site PATL-209-X-2012-1 (Opens in a new window) Field photo showing stream conditions at site PATL-209-X-2012-2 (Opens in a new window)

Located on DOGWOOD RUN in the Patapsco River L N Br watershed, 8-digit code: 02130906.
This stream was visited in the spring on 3/27/2012 and again in the summer on 6/20/2012.

Index of Biotic Integrity (IBI) Results:

An Index of Biotic Integrity (IBI) is a scientific tool used to identify and classify stream health. An IBI associates anthropogenic influences on a stream or with biological condition in the stream, and is formulated using data developed from biosurveys.
Details on the development and application of MBSS IBIs are in this document.
Fish IBI Good - 4.7 / 5.0
Benthic IBI Fair - 3.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 4,469 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 37.2 %
Agricultural Land Use 15.9 %
Forested Land Use 44.9 %


Stream showing woody debris, logs, and rocky substrate.
An example of woody debris in a stream.

Physical Stream Habitat
Instream Habitat 16/20 (Optimal)
Epifaunal Substrate 17/20 (Optimal)
Velocity/Depth Diversity 12/20 (Suboptimal)
Pool Quality
Pool Extent = 50 meters 		12/20 (Suboptimal)
Riffle Quality
Riffle Extent = 60 meters 		16/20 (Optimal)
Shading 70 %
Embeddedness 20 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
pH (lab) 8.27
Alkalinity
(acid neutralizing capacity) 		1770.5 µeq/L
Dissolved organic carbon (DOC) 1.7831 mg/L

Biological Stream Condition:

Surveys of the organisms living within a stream can give indications of stream health. Species richness, or the number of different species present, as well as indicator species (species whose presence, absence or abundance can serve as a measure of environmental conditions) are informative for stream health. 		Close-up of a mayfly indicator species.

Fish Survey Results:
The following 18 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blue Ridge Sculpin 323
Longnose Dace 170
Central Stoneroller 39
Cutlip Minnow 31
Blacknose Dace 20
American Eel 15
River Chub 13
Redbreast Sunfish 11
Swallowtail Shiner 5
Margined Madtom 4
White Sucker 4
Rock Bass 3
Bluegill 2
Creek Chub 2
Green Sunfish 2
Common Shiner 1
Satinfin Shiner 1
Yellow Bullhead 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
Orconectes virilis

Exotic Plants:
Garlic Mustard
Japanese Honeysuckle
Japanese Stiltgrass
Mile-A-Minute
Multiflora Rose
Oriental Bittersweet
Privet
Wineberry
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladius Non-Biting Midges 16
Polypedilum Non-Biting Midges 13
Ephemerella Sulphur Mayfly 10
Dolophilodes Medium Evening Sedge Caddisfly 8
NAIDIDAE Aquatic Worm 8
Gammarus Amphipod 6
Simulium Black Fly 4
Hydrobaenus Midge 4
Rheocricotopus Non-Biting Midges 4
Tanytarsus Non-Biting Midges 3
EMPIDIDAE Dance Fly 3
Cheumatopsyche Net-Spinning Caddisfly 3
Acentrella Tiny Blue-Winged Olive Mayflies 2
ENCHYTRAEIDAE Aquatic Worm 2
Sympotthastia Non-Biting Midges 1
Tanypodinae Non-Biting Midges 1
Thienemanniella Non-Biting Midges 1
Dubiraphia Riffle Beetle 1
Isonychia Slate Drake Mayfly 1
Orthocladiinae Midge 1
Potthastia Non-Biting Midges 1
Diplectrona Net-Spinning Caddisfly 1
Eukiefferiella Non-Biting Midges 1
Micropsectra Non-Biting Midges 1
Corydalus Dobsonfly 1
Acroneuria Golden Stoneflies 1
Caecidotea Isopod 1
HYDROPSYCHIDAE Common Netspinner Caddisfly 1
PERLIDAE Common Stonefly 1
Tipula Crane Fly 1
Calopteryx Damselfly 1
Chelifera Aquatic Dance Fly 1
Clinocera Aquatic Dance Fly 1
TUBIFICIDAE Aquatic Worm 1
Prosimulium Black Fly 1
Kick net sampling for macroinvertebrates.
Sampling with a kick net.

Information disclaimer: The information and data on this page is for guidance and general planning purposes only. It should not be used to make decisions on specific matters.